This Subcontract opportunity from California was posted on July 29, 2026. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

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Hydrology and Hydraulic (H&H) Modeling Services

Closed

State & Local

Submission Closed09/03/2026, 05:00:59 PM PDT

Contract Overview

Solicitation details, issuing organization, response deadlines, documents, and interested companies for this government contract opportunity.

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NAICS: 541620

New

International

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Gitga'at First Nation

POSTED

DEADLINE

RFQ - Independent Environmental Monitor Services for Gitga'at Power Project

Solicitation # 235805

The Gitga'at Power Limited Partnership, acting on behalf of the Gitga'at First Nation, is soliciting proposals for Independent Environmental Monitor (IEM) services for the Gitga'at Power Project in British Columbia. The IEM will be retained by the Owner but must maintain strict independence from the Owner, contractor, and designer, reporting directly to the British Columbia Ministry of Water, Land and Resource Stewardship. The scope of work spans several phases, including pre-construction review of environmental plans, field monitoring of in-stream and riparian works during construction, monitoring of first diversion and ramping, and overseeing site restoration and final close-out reporting. Compliance is measured against the Water Sustainability Act, the project's Water Licence, and the Construction Environmental Management Plan. Submissions must be delivered as a single searchable PDF by December 4, 2026, and must not contain any pricing information, as the final agreement terms will be negotiated with the selected respondent. Evaluation is based on a pass/fail check of mandatory requirements—including professional liability, commercial general, and automobile liability insurance, as well as workers' compensation coverage—followed by a scoring process that heavily weights demonstrated success on similar projects. Key personnel must hold professional registrations appropriate for British Columbia. Respondents are required to provide a submission form, project reference form, and a conflict of interest declaration, while ensuring the total proposal does not exceed 20 pages.

Gitga'at First Nation

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DEADLINE

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DEADLINE

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DEADLINE

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DEADLINE

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POSTED

DEADLINE

GNA Thunder Cat Environmental Planning Services-Umpqua NF

Solicitation # S-62900-00018402

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Department of Forestry

POSTED

DEADLINE

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Department of Economic Development

POSTED

about 13 hours ago

DEADLINE

in 24 days

AI Contract Overview

This subcontract for Hydrology and Hydraulic (H&H) Modeling Services is issued by the California Land Development and Contracts division of Public Works. The project requires the performance of comprehensive hydrologic and hydraulic analysis specifically for detention basin design. Key technical responsibilities include stormwater runoff modeling, floodplain delineation, and conducting capacity assessments across various storm event scenarios. The work is to be performed in San Bernardino, California, under NAICS code 541620. The solicitation was posted on July 29, 2026, and requires a response by the deadline of September 4, 2026.

General Info

H&H modeling for detention basin design in San Bernardino, due September 4, 2026.

Agency

California → Landdevcontracts - Public Works - Land Development & Contracts

NAICS

541620 - Environmental Consulting Services

Place of Performance

San Bernardino, CA, 92415-0835, USA

Set-Aside

NONE

Documents

This scope was carved out of PWG126-ADMIN-6438.

The full solicitation package (6 documents), including the RFP, is on the prime solicitation, not on this scope.

View the prime solicitation

Cable Creek Basin (Upper) RFP

AI Contract Breakdown

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Timeline

PhaseClosed

PostedJul 29

subcontract

Response DeadlineSep 3

Deadline has passed

Submission Closed

09/03/2026, 05:00:59 PM PDT

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Organization & Contact Information

AgencyCalifornia → Landdevcontracts - Public Works - Land Development & Contracts

ContactsNo contacts available

OfficeN/A

Organization / AgencyCalifornia → Landdevcontracts - Public Works - Land Development & Contracts

Office AddressN/A

ContactsNo contact information available

Full Description

Perform hydrologic and hydraulic analysis for detention basin design, including stormwater runoff modeling, floodplain delineation, and capacity assessments under various storm events.